Eighteen year record of circum-Antarctic landfast sea ice distribution allows detailed baseline characterisation, reveals trends and variability
Landfast sea ice (fast ice) is an important though poorly understood component of the cryosphere on the Antarctic continental shelf, where it plays a key role in atmosphere–ocean–ice-sheet interaction and coupled ecological and biogeochemical processes. Here, we present a first in-depth baseline ana...
Published in: | The Cryosphere |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus GmbH
2021
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Online Access: | https://eprints.utas.edu.au/46213/ https://eprints.utas.edu.au/46213/1/144083%20-%2018%20year%20record%20of%20circum-Antarctic%20landfast%20sea%20ice%20distribution.pdf |
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ftunivtasmania:oai:eprints.utas.edu.au:46213 2023-05-15T13:43:28+02:00 Eighteen year record of circum-Antarctic landfast sea ice distribution allows detailed baseline characterisation, reveals trends and variability Fraser, AD Massom, RA Handcock, MS Reid, P Ohshima, KI Raphael, MN Cartwright, J Klekociuk, AR Wang, Z Porter-Smith, R 2021 application/pdf https://eprints.utas.edu.au/46213/ https://eprints.utas.edu.au/46213/1/144083%20-%2018%20year%20record%20of%20circum-Antarctic%20landfast%20sea%20ice%20distribution.pdf en eng Copernicus GmbH https://eprints.utas.edu.au/46213/1/144083%20-%2018%20year%20record%20of%20circum-Antarctic%20landfast%20sea%20ice%20distribution.pdf Fraser, AD orcid:0000-0003-1924-0015 , Massom, RA orcid:0000-0003-1533-5084 , Handcock, MS, Reid, P, Ohshima, KI, Raphael, MN, Cartwright, J, Klekociuk, AR, Wang, Z and Porter-Smith, R orcid:0000-0002-0047-6880 2021 , 'Eighteen year record of circum-Antarctic landfast sea ice distribution allows detailed baseline characterisation, reveals trends and variability' , Cryosphere, vol. 15, no. 11 , 5061–5077 , doi:10.5194/tc-15-5061-2021 <http://dx.doi.org/10.5194/tc-15-5061-2021>. Antarctic landfast sea ice Article PeerReviewed 2021 ftunivtasmania https://doi.org/10.5194/tc-15-5061-2021 2022-06-20T22:16:40Z Landfast sea ice (fast ice) is an important though poorly understood component of the cryosphere on the Antarctic continental shelf, where it plays a key role in atmosphere–ocean–ice-sheet interaction and coupled ecological and biogeochemical processes. Here, we present a first in-depth baseline analysis of variability and change in circum-Antarctic fast-ice distribution (including its relationship to bathymetry), based on a new high-resolution satellite-derived time series for the period 2000 to 2018. This reveals (a) an overall trend of −882±824 km2 yr−1 (−0.19±0.18 % yr−1) and (b) eight distinct regions in terms of fast-ice coverage and modes of formation. Of these, four exhibit positive trends over the 18-year period and four negative. Positive trends are seen in East Antarctica and in the Bellingshausen Sea, with this region claiming the largest positive trend of +1198±359 km2 yr−1 (+1.10±0.35 % yr−1). The four negative trends predominantly occur in West Antarctica, with the largest negative trend of −1206±277 km2 yr−1 (−1.78±0.41 % yr−1) occurring in the Victoria and Oates Land region in the western Ross Sea. All trends are significant. This new baseline analysis represents a significant advance in our knowledge of the current state of both the global cryosphere and the complex Antarctic coastal system, which are vulnerable to climate variability and change. It will also inform a wide range of other studies. Article in Journal/Newspaper Antarc* Antarctic Antarctica Bellingshausen Sea East Antarctica Ice Sheet Oates Land Ross Sea Sea ice West Antarctica University of Tasmania: UTas ePrints Antarctic The Antarctic East Antarctica Ross Sea West Antarctica Bellingshausen Sea Oates Land ENVELOPE(158.000,158.000,-70.000,-70.000) The Cryosphere 15 11 5061 5077 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Antarctic landfast sea ice |
spellingShingle |
Antarctic landfast sea ice Fraser, AD Massom, RA Handcock, MS Reid, P Ohshima, KI Raphael, MN Cartwright, J Klekociuk, AR Wang, Z Porter-Smith, R Eighteen year record of circum-Antarctic landfast sea ice distribution allows detailed baseline characterisation, reveals trends and variability |
topic_facet |
Antarctic landfast sea ice |
description |
Landfast sea ice (fast ice) is an important though poorly understood component of the cryosphere on the Antarctic continental shelf, where it plays a key role in atmosphere–ocean–ice-sheet interaction and coupled ecological and biogeochemical processes. Here, we present a first in-depth baseline analysis of variability and change in circum-Antarctic fast-ice distribution (including its relationship to bathymetry), based on a new high-resolution satellite-derived time series for the period 2000 to 2018. This reveals (a) an overall trend of −882±824 km2 yr−1 (−0.19±0.18 % yr−1) and (b) eight distinct regions in terms of fast-ice coverage and modes of formation. Of these, four exhibit positive trends over the 18-year period and four negative. Positive trends are seen in East Antarctica and in the Bellingshausen Sea, with this region claiming the largest positive trend of +1198±359 km2 yr−1 (+1.10±0.35 % yr−1). The four negative trends predominantly occur in West Antarctica, with the largest negative trend of −1206±277 km2 yr−1 (−1.78±0.41 % yr−1) occurring in the Victoria and Oates Land region in the western Ross Sea. All trends are significant. This new baseline analysis represents a significant advance in our knowledge of the current state of both the global cryosphere and the complex Antarctic coastal system, which are vulnerable to climate variability and change. It will also inform a wide range of other studies. |
format |
Article in Journal/Newspaper |
author |
Fraser, AD Massom, RA Handcock, MS Reid, P Ohshima, KI Raphael, MN Cartwright, J Klekociuk, AR Wang, Z Porter-Smith, R |
author_facet |
Fraser, AD Massom, RA Handcock, MS Reid, P Ohshima, KI Raphael, MN Cartwright, J Klekociuk, AR Wang, Z Porter-Smith, R |
author_sort |
Fraser, AD |
title |
Eighteen year record of circum-Antarctic landfast sea ice distribution allows detailed baseline characterisation, reveals trends and variability |
title_short |
Eighteen year record of circum-Antarctic landfast sea ice distribution allows detailed baseline characterisation, reveals trends and variability |
title_full |
Eighteen year record of circum-Antarctic landfast sea ice distribution allows detailed baseline characterisation, reveals trends and variability |
title_fullStr |
Eighteen year record of circum-Antarctic landfast sea ice distribution allows detailed baseline characterisation, reveals trends and variability |
title_full_unstemmed |
Eighteen year record of circum-Antarctic landfast sea ice distribution allows detailed baseline characterisation, reveals trends and variability |
title_sort |
eighteen year record of circum-antarctic landfast sea ice distribution allows detailed baseline characterisation, reveals trends and variability |
publisher |
Copernicus GmbH |
publishDate |
2021 |
url |
https://eprints.utas.edu.au/46213/ https://eprints.utas.edu.au/46213/1/144083%20-%2018%20year%20record%20of%20circum-Antarctic%20landfast%20sea%20ice%20distribution.pdf |
long_lat |
ENVELOPE(158.000,158.000,-70.000,-70.000) |
geographic |
Antarctic The Antarctic East Antarctica Ross Sea West Antarctica Bellingshausen Sea Oates Land |
geographic_facet |
Antarctic The Antarctic East Antarctica Ross Sea West Antarctica Bellingshausen Sea Oates Land |
genre |
Antarc* Antarctic Antarctica Bellingshausen Sea East Antarctica Ice Sheet Oates Land Ross Sea Sea ice West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Bellingshausen Sea East Antarctica Ice Sheet Oates Land Ross Sea Sea ice West Antarctica |
op_relation |
https://eprints.utas.edu.au/46213/1/144083%20-%2018%20year%20record%20of%20circum-Antarctic%20landfast%20sea%20ice%20distribution.pdf Fraser, AD orcid:0000-0003-1924-0015 , Massom, RA orcid:0000-0003-1533-5084 , Handcock, MS, Reid, P, Ohshima, KI, Raphael, MN, Cartwright, J, Klekociuk, AR, Wang, Z and Porter-Smith, R orcid:0000-0002-0047-6880 2021 , 'Eighteen year record of circum-Antarctic landfast sea ice distribution allows detailed baseline characterisation, reveals trends and variability' , Cryosphere, vol. 15, no. 11 , 5061–5077 , doi:10.5194/tc-15-5061-2021 <http://dx.doi.org/10.5194/tc-15-5061-2021>. |
op_doi |
https://doi.org/10.5194/tc-15-5061-2021 |
container_title |
The Cryosphere |
container_volume |
15 |
container_issue |
11 |
container_start_page |
5061 |
op_container_end_page |
5077 |
_version_ |
1766189253063081984 |